Answer: x = 6
Step-by-step explanation: To solve for x, we must first
isolate the term containing x, which in this problem is 2x.
Since 4 is being added to 2x, we subtract 4
from both sides of the equation to isolate the 2x.
On the left, the +4 and -4 cancels
out and on the right, 16 - 4 is 12.
So we have 2x = 12.
Then just divide both sides by 2 so <em>x = 6</em>.
